HP Jetdirect 200m HP Jetdirect 200m Print Server (English) User Guide - Page 14

Wireless LANs, at such a distance the data rate

Get HP Jetdirect 200m PDF manuals and user guides View all HP Jetdirect 200m manuals
Add to My Manuals
Save this manual to your list of manuals

Page 14 highlights

NETWORKS Wireless LANs In a wireless LAN, information travels through the air in radiofrequency signals instead of through wires. This makes wireless LANs very flexible, and setup and reconfiguration are very easy. Communication speeds on wireless LANs, however, tend to be slower than on wired LANs, and it generally takes more work to make a wireless LAN as secure as a wired LAN. Most wireless LANs conform to one of the subsets of the IEEE 802.11 standard; the most common subset is currently 802.11b. Data rates for 802.11b LANs can be as high as 11 Mbps (megabits per second). Typically a wireless device in an 802.11b LAN can transmit signals across a distance of about 30 meters (100 feet) in a semi-open office (no walls) and still maintain a data rate of 11 Mbps. It is possible to extend the range to about 100 meters (300 feet), but at such a distance the data rate drops off to 1 Mbps. 802.11b wireless LANs operate in the 2.4 GHz frequency band. There are several channels (frequencies) that wireless LANs can use in this range. Government regulations prescribe which channels may be used in various parts of the world. There are two basic wireless networking topologies -infrastructure mode and ad hoc mode; these are described in the detail pages (see below).

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
  • 170
  • 171
  • 172
  • 173
  • 174
  • 175
  • 176
  • 177
  • 178
  • 179
  • 180
  • 181
NETWORKS
Wireless LANs
In a wireless LAN, information
travels through the air in radio-
frequency signals instead of
through wires. This makes
wireless LANs very flexible, and
setup and reconfiguration are
very easy. Communication
speeds on wireless LANs,
however, tend to be slower than
on wired LANs, and it generally
takes more work to make a
wireless LAN as secure as a
wired LAN.
Most wireless LANs conform to
one of the subsets of the IEEE
802.11 standard; the most
common subset is currently
802.11b. Data rates for 802.11b
LANs can be as high as 11 Mbps
(megabits per second). Typically
a wireless device in an 802.11b
LAN can transmit signals across
a distance of about 30 meters
(100 feet) in a semi-open office
(no walls) and still maintain a
data rate of 11 Mbps. It is
possible to extend the range to
about 100 meters (300 feet), but
at such a distance the data rate
drops off to 1 Mbps.
802.11b wireless LANs operate in
the 2.4 GHz frequency band.
There are several channels
(frequencies) that wireless LANs
can use in this range.
Government regulations
prescribe which channels may be
used in various parts of the
world.
There are two basic wireless
networking topologies --
infrastructure mode and ad hoc
mode; these are described in the
detail pages (see below).